Abstract
In this 3?2 factorial design trial with three different levels of metabolizable energy (13.4, 13.00, 12.6 MJ/kg), with and without exogenous enzymes (nutrition density was reduced by introducing sunflower meal in different percentage to diet (0, 8 ? 16%)), the goal was to investigate the effects of exogenous enzymes Roxazyme G2G (cellulase (endo-1,4-(?-glucanase), ?- glucanase (endo-1,3(4)-?-glucanase) and xylanase (endo-1,4- ? xylanase)) on digestibility and energy utilization. Effects of enzymes were most visible in diet with 13.00 MJ/kg and 12.6 MJ/kg while this effect was unnoticed in the group with 13.4 MJ/kg. Reducing of ME caused the decrease in digestibility and metabolizability (ME/GE). The results suggest that exogenous enzymes, used in this trial, increase digestibility of crude proteins, NDF, hemicelluloses and ash (?<0.05), but the effects were most evident in diets with the reduced level of metabolizable energy.
Highlights
In this 3х2 factorial design trial with three different levels of metabolizable energy (13.4, 13.00, 12.6 MJ/kg), with and without exogenous enzymes (nutrition density was reduced by introducing sunflower meal in different percentage to diet (0, 8 и 16%)), the goal was to investigate the effects of exogenous enzymes Roxazyme G2G (cellulase (endo-1,4-(β-glucanase), βglucanase (endo-1,3(4)-β-glucanase) and xylanase) on digestibility and energy utilization
Enzyme complex had a significant effect (P
The present study demonstrated that the addition of the multicarbohydrase supplement of cell wall degrading enzymes did not improve digestibility of nutrients and energy in diet with not reduced metabolizable energy level
Summary
In this 3х2 factorial design trial with three different levels of metabolizable energy (13.4, 13.00, 12.6 MJ/kg), with and without exogenous enzymes (nutrition density was reduced by introducing sunflower meal in different percentage to diet (0, 8 и 16%)), the goal was to investigate the effects of exogenous enzymes Roxazyme G2G (cellulase (endo-1,4-(β-glucanase), βglucanase (endo-1,3(4)-β-glucanase) and xylanase (endo-1,4- β xylanase)) on digestibility and energy utilization. The effect of the usage of exogenous enzyme in some studies is more visible when metabolizable energy level is reduced (Zhou, 2008). The goal of this trail was to investigate effects of added exogenous enzymes Roxazyme G2G (cellulase (endo-1,4-(β-glucanase), β-glucanase (endo1,3(4)-β-glucanase) and xylanase (endo-1,4- β xylanase)) on digestibility of nutrients and energy utilization of broilers diet variably in metabolic energy, of 2831 days old male Ross 308 broilers.
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